Eobeet simon



(No Model.)

R. SIM O N.

POWER LOOM. No. 286.081. Patented Oct. 2, L883.

ATTORNEY "nu'rnn STATES PATENT tries,

ROBERT SIMON, OF VEEHAXVKEN, NE\V JERSEY.

POWER-LOOM.

SPECIFICATION forming part of Letters Patent No.286,081, dated October2, 1883.

Application filed March 20, 1882. (No model) To all whom it mayconcern.-

Be it known that I, ROBERT SIMON, of \Veehawken, (town of Union,) in thecounty of Hudson and State of New Jersey, have invent-ed certain new anduseful Improvements in Power-Looms, of which the following is aspecification.

This invention relates to looms which run with a free laythat is to say,looms in which the lay is pushed back by suitable mechanism, and thenallowed to drop forward of its own gravity for driving up theweft-threads. In looms of this class in ordinary use the lay is pushedback by a double cam keyed to a shaft, one revolution of which willcause the lay to make the movements for two picks, thus allowingone-half the revolution of the cam to a full movement of the lay. \Vhenthe lay reaches the end of its forward stroke, it rebounds backward fora certain distance, and its backward stroke is then completed by thecam, which then comes incontaet with its actuating-lever. Unless themotion produced by the cam follows exactly the rebounding motion of thelay, an irregular or jarring motion of the lay is the result. As theperiphery of the double cam referred to must be so shaped as to effecttwo full movements of the lay to one rotation of the cam, the curves ofthe latter are necessarily abrupt and do not producethe desiredharmonious movement of the lay under all circumstances. Variation in thespeed of the motive power, and slight changes in any of the workingparts, whether caused by atmospheric infiuenees'or by the wearing awayof some of the parts, will destroy the harmony of the rebounding and cammotions of the lay, causing the latter to jar and the loom to producegoods of unequal texture. Furthermore, the irregular wabbling motion ofthe lay thus caused entails much loss of time, as in consequence thereofthe shuttle often remains in the shed and knocks the warpthreads out,being thrown against the threads and stopped by frictional contacttherewith.

The object of this invention is to secure a regular and determinatemotion of the lay throughout its entire swing, whereby theabove-mentioned defects will be obviated.

Theinvention consists, principally, in a cam the periphery of whichforms approximately an involut-e curve having its outer end slightlybent inward, whereby the movement of the lay in a power-loom may be madeto imitate the motion of the lay in a hand-loom.

The invention consists, further, in the combination of a cam of theshape described with the lay and intermediate motion-transmittingmechanism.

The invention consists, further, in the combination of a cam of theshape described, the

lay, and certain specific motion-transmit-ting mechanisms, hereinafterdescribed.

The aecom )Ztll in drawin re )rcsents a vei= tical longitudinal sectionof a power-loom of ceives its motion from an auxiliary shaft, D,

which carries a cam, D, of peculiar construction, said cam being shownclearly in the drawing, and being made in such a form that the movementwhich it imparts by intermediate transmitting mechanism to the lay corresponds as nearly as possible to the movement of the lay in a hand-loom.The periphery of this cam forms approximately an involute curve, theouter end of which is slightly bent inward. The shape of this cam hasbeen the result of practical experience, and is so proportioned as tofollow the rebounding action of the lay after it has struck the lastpick, and continue the movement of the lay in backward direction, andthen gradually diminish the motion of the lay until it arrives at itsextreme backward position, at which point the lay is free to suddenlydrop again, so as to strike the next pick and place the same in properposition. The auxiliary shaft D of the cam D receives by suitabletransmitting gear-wheels a a, twice the speed of the main shaft 0, so asto make two revolutions to one of the main shaft, whereby a fullrevolution of the cam is ohtained for each movement of the lay. 3y thusemployingone entire revolution of the cam for each movement of thelaythe cam can be so enlarged and-shaped as to secure a continuous contact,or nearly so, of the cam with the actuating-lever of the lay, wherebythe latter is brought back and retained in its rearmost position withouta jar, so as to allow the shuttle to pass through the shed withoutstraining, the lay being then dropped by its own gravity. By means ofthe auxiliary cam described, the loom can be run with a speed of onehundred and fifteen to one hundred and twenty picks per minute, and insuch a manner that differences in the speed of the motive power willexert no injurious influence upon'the quality go'terposing of anauxiliary shaft with a cam of of the fabric.

The mechanism-by which motion is transmitted from the cam to the layconsists of an oscillating treadle, I), acted upon by the cam,abell-crank lever, 0, a s n'ing-cushioned. rod, d, connecting said leverand treadle, and a link, j, which latter is connected to a fixed arm, f,of the lay, as shown clearly in the d rawi n g.

To the transmitting mechanism just de scribed, as well as to the otherusual accessories of the loom, I lay no separate claim, as the essentialfeature of this invention is in the inpeculiarconstruction, revolving attwice the speed of the main shaft between the drivingshaft and themotion-transmitting mechanism of the oscillating lay.

Thelay B is provided at both ends with shuttle-boxes, preferably of a,construction whereby the shuttle E,- on entering the box, graduallydiminishes its speed and comes finally to a stop without running back.

"What is claimed as the invention is- 1. The cam D, the periphery ofwhich forms, approximately, an involute curve having its outer endslightly bent inward, substantially as described.

2. The combination of a camthe periphery of which forms, approximately,an involute curve having its outer end slightly bent inward, with a layof a loom and intermediate devices between said cam and lay,substantially as set forth.

3. The combination, with a main shaft, an

auxiliary shaft, and intermediate transmitting mechanism between saidshafts, whereby the auxiliary shaft may rotate at twice the speed of themain shaft, ofa cam on said auxiliary shaft, the periphery of said camforming, ap-

proximately, an involute curve having its outer end slightly bentinward, an oscillating lay, and means for transmitting motion to the layfrom the cam, substantially as described.

4. The combination of a main shaft, 0, an auxiliary shaft, 1),intermediate gearing between said shafts, whereby the auxiliary shaftmay rotate at twice the speed of the main shaft, aeam, D7, on saidauxiliary shaft D, the periphery of said cam forming, approximately, aninvolute curve having its outer end slightly bent inward, a treadle, I),a .bellcrank lever,

